DESCRIPTION

CERTI-VEX PENSEAL 244 100% is a premium high performance, breathable, efficient clear penetrating water repellent sealer. Treated surfaces have a totally natural appearance. When properly applied the treatment does not produce a surface build up, darkening or other effect on the natural color or texture of the surface leaving a natural appearance. The material’s small molecular structure allows for maximum penetration into new concrete (14 day minimum) or existing concrete and masonry surfaces. Certi-Vex Penseal 244 100% stops the intrusion of water, salts, deicer chemicals, and acid rain, which often result in efflorescence, mildew growth, corrosion, scaling, spalling, surface erosion, and other costly damage to hard surfaces. Certi-Vex Penseal 244 100% penetrates into the pores and capillaries of the cement based materials reacting with the moisture and chemicals in the substrate, polymerizing and sealing the pores, which prevents water and chloride ION penetration. Treatment of reinforced concrete reduces surface erosion and corrosion of rebar caused by attack of water and water borne salts and alkalis.

BENEFITS

• Extends the life of concrete and masonry
• Maximum long term protection against salt corrosion, deicing chemicals, mildew, water, wind driven rain, airborne contaminants, surface spalling from freeze/thaw cycles and other extreme weather conditions
• Reduces corrosion of rebar and surface erosion in reinforced concrete
• An effective chloride screen
• Contains long alkyl groups especially suitable for alkaline concrete surfaces
• Prolongs the surface life and prevents damage from within by maintaining vapor permeability
• Can be applied to damp surfaces
• Quick formation of surface repellency and chemical resistance
• Does not alter natural surface texture or appearance
• Greatest depth of penetration
• Keeps substrate cleaner

RECOMMENDED FOR

Engineered for department of transportations; bridges, highways, platforms and other super structures

• Pre-cast concrete
• Concrete block & CMU
• Cast-in-place concrete
• Tunnel walls
• Brick walls
• Bridge decks
• Parking structures
• Sound walls
• Median barriers
• Concrete ramps
• Other reinforced concrete structures

SHORT SPECIFICATON

07 19 16: Low VOC water repellent. VOC content less than 250 grams /liter . Meets or exceeds NCHRP 244 Series IV test, reducing water and salt penetration by 90%. Ten year warranty. Manufactured by Vexcon Chemicals.

PRE-INSTALLATION NOTES

Precaution: Do not use near fire or extreme heat and provide good ventilation to avoid buildup of solvent fumes. Applicators should wear NIOSH/MSHA approved respirators. When applying to the exteriors of occupied buildings all exterior air conditioning vents should be covered during application and air-handling equipment should be turned off during application to avoid solvent odors within the building

• A test application is necessary on each surface to be treated to ensure compatibility and desired water repellency. Test areas are also useful in determining final application rate and procedures.
• If the material in the test area does not fully penetrate due to coatings or inadequately cleaned surface, use one of Vexcon’s cleaners and stain removal products to properly clean the surface prior to application
• If a tacky residue remains after 24 hrs, the application rate must be modified. Material which remains tacky on the surface can usually be removed by washing with water or a vinegar solution.
• Tests should be applied using the same equipment and techniques planned for job application.
• Overspray can be removed with Certi-Vex? Equipment Cleaner before the solution has dried. Protect non-porous surfaces.

SURFACE PREPARATION

• All caulking, patching and joint sealants should be installed and fully cured prior to application. Concrete should be properly cured, see Curing Recommendations section.
• All surfaces must be cleaned free of dust, dirt, surface materials, previous coatings and contaminants.
• New concrete normally does not require etching. However, slick trowel finished concrete that has become heavily contaminated with surface dirt, tire marks, oil, etc., during construction may require thorough cleaning and a mild etch using Certi-Vex Etch & Efflorescence Remover.
• Older concrete: Acceptable surface cleaing methods include shot blasting, sand blasting, power washing or chemically treat using one of Vexcons surface prep and cleaning products.
• To determine that the concrete is penetrable perform a water absorbency test by applying water to a representative portion of the prepared surface. A properly prepared surface when dry will immediately absorb clean water without any surface beading effects.
• If required use Certi-Vex Etch & Efflorescence Remover to improve sealer penetration.
• Surfaces to be treated may be damp but should be absorbent to assure good penetration.
• Application to still damp surfaces is acceptable however free standing water must be removed.

CURING RECOMMENDATIONS

1. Concrete can be cured with Certi-Vex Envio Cure, an emulsion resin cure, which will dissipate. Allow to dissipate or remove with Certi-Vex Concrete Stripper.
2. Wet Cure

APPLICATION

• Do not dilute.
• Apply with low-pressure (20-PSI) airless industrial spray equipment. Sprayer should be fitted with solvent resistant hoses and gaskets.
• If using brushes or rollers care should be taken to ensure that enough solution is applied.
• Treated surfaces should be protected from rain and foot traffic for 4-6 hours following application.
• Protect from vehicular traffic until the surface is dry

HORIZONTAL SURFACES

• Apply in a single saturating application with sufficient material applied so the surface remains wet for a few minutes before penetration into the surface
• Surface residues, pools and puddles should be broomed or brushed out until they completely penetrate into the surface

VERTICAL SURFACES

• Certi-Vex Penseal 244 100% should be applied and absorbed on the substrate to the specified coverage rate.
• In the case of extremely dense, mirror finish architectural concrete and similar surfaces, it may be necessary to restrict the amount of material by first applying a light mist coat by the procedure listed below in order to prevent surface darkening.
• Allow the mist coat to penetrate the surface (approximately 3-5 minutes) and apply in the same saturation manner.
• Apply in a flooding application, from the bottom up with sufficient material applied to provide a 6" to 8" run down below the contact point of the new spray pattern with the surface.

SPECIFICATIONS/COMPLIANCE

• VOC - < 250grams/liter or 2.08/gal
• Meets:
  • USEPA AIM - Waterproofing Sealers and Treatments
  • OTC - LADCO/MRPO - CEPA/EC Waterproofing Concrete/Masonry Sealers
  • CARB - Reacive Penetrating Sealers
  • SCAQMD Rule 1113 Reactive Penetrating Sealers
• Meets NCHRP 244 Series II & IV
  • Water Loss Reduction, coated samples, 14 days at 50% RH: 86.7%
  • Water Loss Reduction, coated samples, 21 days in 15% NaCl: 93.2%, UV 92.6%
  • Reduction of Chloride Penetration into concrete, (0-1”- Coated 95.3%, - UV 94.6%), (0-2”- Coated 94.6%, - UV 92.6%)
• AASHTO T259/260- Chloride Ion Analysis 90 days salt ponding
  • 1/16” 1/2” 0.63 #/cu.yd. avg. @ 250 sq.ft./gal
  • 1/2” 1” 0.35 #/cu.yd. avg. @ 250 sq.ft./gal
• ASTM C672 Scale rating - 100 freeze thaw cycles-0 (no scaling).
• Penetration (1 application) 0.150 -0.26", substrate dependant
• ASTM E96 Water Vapor Permeability - 95%
• ASTM D2047 Coefficient of friction 0.84 average
• ASTM C642 Absorption in Hardened Concrete > 90%

24 hour immersion	0.33%
48 hour immersion	0.40%
24 hour boil	0.81%
50 days immersion	1.43%

• CSI reference: 07 19 16

PHYSICAL PROPERTIES

• Color: Clear
• Dry time
• Vehicle traffic: 1 hour
• Dry Through: 3 - 4 hours
• Total solids and active ingredients by wt.100% silane Dry times are based upon 68 - 77⁰F (20 - 25⁰C). Lower temperatures and the relative humidity will extend dry times

SPECIAL NOTES

• For use by experienced contractors.
• The product should be stored in sealed containers and kept away form extreme heat.
• Do not apply water repellent treatment on windy days.
• Do not apply water repellent treatment when surface temperatures are below or expected to fall below 20°F (-6°C) or above 90°F (32°C).
• Protect plant life and landscaping from overspray.
• Line stripping can be done after application of sealer. Contact Vexcon Technical Service for additional information.
• Do not apply in rain or when rain is expected within 4 hours.
• Shelf Life: If properly stored in its original sealed container, 3 years from date of manufacture. Rotate your stock.
• Proper application of Vexcon material is the responsibility of the installer or user. Telephone consultation and/or field visits by Vexcon personnel are for the sole purpose of making technical recommendations only, and not for providing quality control or supervision on location.
• Warranty: All products are sold subject to Vexcon’s published materials Limited Warranty and Terms and Conditions of Sale which are available at vexcon.com

COVERAGE RATES/ESTIMATING

Porosity and texture of the surface will affect the amount of material necessary for effective treatment. The following is a guide for estimating material requirements. Always test on the actual surface to get precise coverage

• Concrete/Horizontal

Broom finish	125-250 ft2/gal. (3.1-6 m2/L)
Smooth finish	250-400 ft2/gal. (610 m2/L)
Porous concrete	95-250 ft2/gal.(2.4-6 m2/L)

• Concrete/Vertical

CIP or Precast	150-250 ft2/gal (3.5-6 m2/L)
Stucco	95-140 ft2/gal (2.4-3.5 m2/L)

• Architectural Concrete block

Smooth-faced	95-140 ft2/gal (2.4-3.5 m2/L)
Split-faced	50-100 ft2/gal (1.25-2.5 m2/L)
Ground-faced	200-250 ft2/gal (5-6.25 m2/L)

• Brick

Smooth	125-140 ft2/gal (3.1-3.5 m2/L
Wire cut	50-100 ft2/gal (1.25-2.5 m2/L)

HEALTH AND SAFETY

• Use of respirators is mandatory when using this product in confined areas.
• Use only with adequate ventilation.
• If swallowed, do not induce vomiting.
• Use of gloves, goggles and other protective clothing is advised when using this product.

Vexcon MSDS PS115 is an integral part of the safety and application of our product. A short synopsis is provided in this data sheet. Before using this product it is advisable to obtain a copy of the MSDS from your distributor or at vexcon.com

PACKAGING

Certi-Vex Penseal 244 100% is available in 55-gallon drums. Contact Vexcon to discuss your customized packaging requirements.